North and South Korea have exchanged gunfire in the Demilitarised Zone (DMZ) which divides the two countries.
Gunshots fired by North Korea at 07:41 (23:41 BST) hit a South Korean guard post in the central border town of Cheorwon, Seoul’s military said.
No casualties were reported on the South Korean side.
In response, South Korea fired “two rounds of gunfire and a warning announcement according to our manual”, the military statement said.
It is not clear what provoked the initial gunshots. The joint chiefs of staff (JCS) said that they were trying to contact North Korea through their military hotline to determine the cause of the incident.